Malicious PDF — malware analysis report

Static analysis result for SHA-256 610c5c5287700ff1…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 05:58:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8313ec26f9ddf0a7dfdc31d2af77f4dd SHA-1: 31e9a134b752ac18d7edbd8903d10d9f3581ba52 SHA-256: 610c5c5287700ff1746652e05c92e2626f32deea54e427d300075fbabfd94482
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are disguised as download links for game-related cheats and hacks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being used for malicious purposes, likely to distribute malware or lead users to phishing sites. No scripts were extracted, but the presence of many suspicious URLs suggests a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/free-bandit-mask-roblox-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E0 25684 bytes
SHA-256: dfecab609d81d4d654e2b91b1d8a00909183e8d04bb571e69b1fdd2df6b7daf2
font_01_sfnt_off00008f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F02 18940 bytes
SHA-256: 7398f708f86b125eb6cf5f2f6225b12f827d44eeb60e1a8b9358e91e508a2bea

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